[WPML integration with Algolia Search] Can not synchronise multi-language

[MrKoopie]

What did you expect to happen?

Index all the selected posts in all languages.

What happened instead?

Only the English posts are synchronised. When I switch in the back-end to Dutch, only the Dutch language gets synchronised. I have used the integration suggestion as shown in https://community.algolia.com/wordpress/wpml.html by creating a plugin file in mu-plugins. It does transport the language code to Agolia, however it only transfers the current language of the admin user.

How can we reproduce this behavior?

Install WPML with two languages and synchronise the index.

Can you provide a link to a page which shows this issue?

I can provide a installation per e-mail upon request.

Technical info

• WordPress version: 4.8.2
• Algolia Search plugin version: 2.8.1
• WPML 3.8.3